A girl (usually white) who dresses like a homeless man. May wear leggings as pants!! She struts her stuff in shitty suberb mall areas and still manages to lower the shitty suberbs standards. An underachiever who's ego is too big. Mostly an outsider or out of town-er trying to fit in but really should stay at home. Also fits the discription of an ugly whore, slut, the "wrong" girl for the guy, and may carry STD (s).

Classy Girl Two: "Alerted! EW Mufftart! Omg yes, that's disgusting, LEGGINGS ARE NOT PANTS. Where does she get off lowering the low? Disgrace"
Classy Girl Three: "Oh that guy she's with is WAY too good for her, poor daft boy stuck with the mufftart."